# Gray - Louis Lake Road - PIFL - WY041, PAGES North America 2k Version #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using these data, # If there is no publication information, please cite investigator, title, online resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/1000122 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/namerica2k/nam-tr_144-wy041-1200-1987.txt # Original_Source_URL: https://www.ncdc.noaa.gov/paleo/study/12757 # # Archive: Tree Ring #------------------- # Contribution_Date # Date: 2013-05-15 #------------------- # Title: Gray - Louis Lake Road - PIFL - WY041, PAGES North America 2k Version #------------------- # Investigators: Gray, S.T.; Pederson, G.T.; Abel, K. #------------------- # Description_Notes_and_Keywords # Description: # #------------------- # Publication # Authors: Pederson, G.T., S.T. Gray, C.A. Woodhouse, J.L. Betancourt, D.B. Fagre, J.S. Littell, E. Watson, B.H. Luckman, and L.J. Graumlich. 2011. The unusual nature of recent snowpack declines in the North American Cordillera. Sciencexpress, Published online 9 June 2011. DOI: 10.1126/science.1201570 # Journal_Name: Science # Published_Title: The unusual nature of recent snowpack declines in the North American Cordillera # Published_Date_or_Year: 2011 # Volume: In western North America snowpack has declined in recent decades, and further losses are projected through the 21st century. Here we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff generating areas of the Colorado, Columbia and Missouri River drainages. Over the past millennium, late-20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky Mountains, and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western USA. # Pages: # DOI: 10.1126/science.1201570 # Full_Citation: # Abstract: #------------------- # Site Information # Site_Name: Louis Lake Road # Northernmost_Latitude: 42.55 # Southernmost_Latitude: 42.55 # Easternmost_Longitude: -108.8167 # Westernmost_Longitude: -108.8167 # Elevation: 2731 #------------------- # Data Collection # Collection_Name: NAm-TR_144-wy041-1200-1987 # First_Year: 1200 # Last_Year: 1987 # Time_Unit: AD # Notes: #------------------- # Species # Species_Name: Pinus flexilis E. James # Common_Name: limber pine #------------------- # Variables # variables format: shortname 9 var components: what,material,error,units,season,archive,detail,method, C or N for Char or Numeric data ## age_AD Age,,,years AD,,,,,N ## trsgi.0mean Tree Ring Standardized Growth Index,,,unitless,,Tree Ring,mean of zero,,N # #-------------------------- # Data # Missing Value: -999 age_AD trsgi.0mean 1200 2.41766 1201 4.36657 1202 3.17168 1203 2.46023 1204 3.29026 1205 1.60587 1206 1.089 1207 2.62441 1208 1.27142 1209 .173829 1210 3.13216 1211 3.41492 1212 .918732 1213 2.46327 1214 -.634923 1215 -.169739 1216 .566043 1217 -1.55921 1218 -.619721 1219 -.048122 1220 -.759581 1221 .0187673 1222 .407941 1223 -1.66259 1224 .529558 1225 -.428175 1226 -.0146774 1227 -.82951 1228 .61165 1229 -1.58354 1230 .0339694 1231 .374497 1232 .550841 1233 -.929844 1234 -2.00311 1235 -.17886 1236 .404901 1237 1.00082 1238 1.21669 1239 1.79741 1240 .298486 1241 1.8035 1242 1.5481 1243 .815358 1244 -.644045 1245 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